1780425136 has 20 divisors (see below), whose sum is σ = 3942370192. Its totient is φ = 763039296.

The previous prime is 1780425121. The next prime is 1780425151. The reversal of 1780425136 is 6315240871.

It is an interprime number because it is at equal distance from previous prime (1780425121) and next prime (1780425151).

It is a junction number, because it is equal to n+sod(n) for n = 1780425095 and 1780425104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7948215 + ... + 7948438.

Almost surely, 2^1780425136 is an apocalyptic number.

1780425136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1780425136 is an abundant number, since it is smaller than the sum of its proper divisors (2161945056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1780425136 is a wasteful number, since it uses less digits than its factorization.

1780425136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15896668 (or 15896662 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 1780425136 is about 42195.0842634542. The cubic root of 1780425136 is about 1212.0147514606.

The spelling of 1780425136 in words is "one billion, seven hundred eighty million, four hundred twenty-five thousand, one hundred thirty-six".